* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.margin-top-20 {
  margin-top: 20px;
}
.margin-left-10 {
  margin-left: 10px;
}
.padding-left-50 {
  padding-left: 50px;
}
.text-center {
  text-align: center;
}
.float-right {
  float: right;
}
